This is a list of public utilities.

Natural gas companies

• List of British natural gas companies
• List of Canadian natural gas companies
• List of French natural gas companies
• List of German natural gas companies
• List of Italian natural gas companies
• List of Japan natural gas companies
• List of Mexican natural gas companies
• List of United States natural gas companies

Electricity companies

• Australia: EnergyAustralia, Origin Energy, TRUenergy, SEC Victoria (fmr.), Powercor, AGL, Alinta, Citipower, ETSA Utilities, Western Power, Country Energy, Energex, Integral Energy, ActewAGL, Ergon Energy, Power and Water
• Belgium: Electrabel [1]
• List of Canadian electric utilities
• People's Republic of China: State Grid Corporation
  • Hong Kong: Hongkong Electric, CLP Power
• Czech Republic: CEZ [2]
• Finland: Fortum
• France: Électricité de France (EdF)
• Germany: E.ON, RWE, EnBW, Vattenfall
• Greece: DEI (Greek Hydro)

• Indonesia: PLN
• Italy: Enel, Energit, Italenergia, Edison
• Japan: Kansai Electric Power (Kepco),Tokyo Electric Power (Tepco), Chubu Electric Power, Chugoku Electric Power, Hokuriku Electric Power, Hokkaido Electric Power, Kyushu Electric Power, Tohoku Electric Power, Shikoku Electric Power,Okinawa Electric Power

• Malaysia: Tenaga Nasional Berhad (TNB) [3]
• New Zealand: Meridian Energy Limited Genesis Power Limited Transpower New Zealand Limited Mighty River Power Limited
• Singapore: Singapore Power
• South Africa: Eskom
• South Korea: Korea Electric Power Corporation (Kepco) [4]
• Spain: Endesa, Iberdrola
• Sweden: Vattenfall
• United Kingdom: National Grid, Scottish Power, Scottish and Southern Energy
• List of United States electric companies

Telephone companies

• List of Canadian telephone companies
• Australia: Telstra, Optus, Vodafone, Hutchison Telecom(3G network), AAPT, Primus Telecom, Nextgen Networks, Agile Communications, TransACT
• People's Republic of China
  • Hong Kong: PCCW Limited, New World Telephone, Hutchison Telecom
• Germany: Deutsche Telekom, Arcor AG, Freenet AG, T-Mobile, Vodafone Germany
• Greece: Hellenic Telecommunication Organization (OTE)
• List of Italian telephone companies
• Indonesia: Telkom
• Japan: NTT, (NTT East, and NTT West)
• Spain: Telefónica
• South Africa: Telkom
• List of United States telephone companies

Water companies

• France
  • Suez, formerly Lyonnaise des Eaux
  • Veolia Environnement, formerly Vivendi, formerly Compagnie Generale des Eaux
• Greece-Hellas
  • ΔΕΥΑ Καλλικράτειας ||
• Italy
  • Hera
  • Seabo
• United Kingdom

List of United Kingdom water companies

• United States

List of United States water companies

Steam companies

Note: some of these companies are still trading, others are listed here for historical interest

• New York Steam Company, now Con Edison Steam Operations
• American District Steam Company
• Boston Heating Company
• Compagnie Parisienne de Chauffage Urbain

Former hydraulic power companies

• London Hydraulic Power Company, defunct since 1977
• Liverpool Hydraulic Power Company

See also

• Off-the-grid